Hello, Marcjan and Thank your for your answer.
Ok, I have one ET200s Im151-8 pn/dp cpu, then it isn´t peripheral device, this device is a Cpu like for example a Cpu 315 pn/dp of S7-300.
Then in Device configuration, the Q address is 368....371, then I thought that the direction of ch1 of the board is AW368 and AW370 for ch2, I Tried to put PAW368 or PAW370 in a Watch table but it give me to fault. Do you have any idea?
I use a board 2ao st1 (6es7 135-4gb01-0ab0) with terminal board (6es7 193-4cb20-0aa0), and I measure between terminal 1 and 3 for ch1, and terminal 5 and 7 for ch2.